No, it's the job of the prosecution to produce evidence that is certain. Evidence that has been handled in a way that makes contamination as close to impossible as possible. The safeguards in the labs such as cleaning protocol and positive pressure hoods are required. They are required precisely to eliminate the possibility of contamination in vast, vast majority of tests.
If the safeguards were not present, it would be very difficul to show probable contamination often - if that were not true the more stringent protocols wouldn't be necessary.
But this is just false. And this is not a jury based adversarial system in which the evidence can be preemptively selected by a judge. The duty of the prosecution is not at all to bring findings that have an absolute certain or certified meaning, it is instead to just bring facts that are meaningful on a probabilistic level. You can well reach a certain conclusion without any "smoking gun" and with not a single element that is absolutely certain. There is no need of absolute certainty thresholds or certifications whatsoever for evidence in a trial.
Well I for one thing the box was handled by cops that were in the cottage IIRC. I could get a cite but no one would care
But you can't be serious calling tho a "connection with MK". Tertiary transfer from having breathed the air inside a house (not the room). What are the records in science of a transfer under these condition? What are the odds? It' ridiculous. You could start talking of probability approaching the area of reasonable probability if Gubbiotti was wearing a jacket completely splashed with Meredith's blood. Btw Gubbiotti did not leave his alleged contaminating MK's DNA on any other item he handled from Sollecito's apartment; actually not even his own DNA is found on the knife, nor that of other forensics, not even on any other item collects in Sollecito's apartment.
Raf's DNA was on the door, someone in the 6 weeks between CSI visits got his DNA from door and then touched the bra clasp as they moved thing around in MK's room. MK's DNA wasn't on the knife at all but if it had been one source would from the lab itself. It could be secondary transfer from Amanda to the knife. The cop in the station could have picked up some MK DNA and then transferred to the box.
But, first you don't even have evidence of RS's DNA on the door, in what amount was it there? Did Sollecito lick extensively the surface? There is no evidence of a source of any massive or anyway statistically significant size.
Then, who would this "someone" be? Did anyone pick up the clasp? How did Sollecito's DNA from a dry trace stick on the metal? And nowhere else? What are the odds for this transfer? Whereas the operator did not manage to leave not even his own profile on any item, not even on the floor?
And the knife, with 6 days of interval during which 105 samples were analyzed by the same machine and no MK trace found (this is the Novelli report)?
Amanda's secondary transfer, an isolated trace on a blade? Why not on the handle then? Why not on the things Knox touched most frequently? And after all, why should Knox come into contact with a large source of Meredith's DNA? And even if that was the case, would any better forensic technique change anything to this matter?
There are a plethora of ways it could have ended up there with the slack behavior of Stefanoni. Are you related to her?
Has any non-police associated or non Italian expert backed the work of Steffy.
And has any non "defense-siding" expert found anything to the contrary? Any non Vecchiotti- related expert?
Actually I find your demand utterly nonsense. Any expert in a trial is expected to take a side. It makes no sense to think about a "non-related" experts. An expert will necessarily come into contact with a trial through some party involved and will happend to be on some side. When you approach the trial material for real, when you actualy get involved and deal seriously with the matter, being on a side is just unavoidable, this is always when it comes to do serious job.
So, I ask myself: what would I do if I were a DNA scientist (like Gill) who just happens to think the two accused are probably guilty, and that the forensic evidence was probably good, but I was not involved in the case and never had direct knowledge of the trial matter. Would I stand up, publicly defending Stefanoni, take a public position?
You forget it. I would remain silent, take care about my job and not spout judgement about others' job in which I was not involved. I would never issue publications carrying judgments and conclusions about a case where I was not working. It's just not serious. It's not scientific.
I know about Balding and also about another big name who were making statements expressing agreement with the validity of Stefanoni's interpretation and conclusions. But they keep themselves out from the public discourse, or made clear they were outsiders that could perform only limited observations; and rightly so. Being serious means speak about things you deal seriously with, do that in serious venues and terms. Not write conclusions about things you didn't investigate directly.
A "non-involved" expert, someone not siding and not speaking within the trial, who does not even hapen deal with that particular system, who publicly "backs" sides through judgments and conclusions, is not doing something serious. A serious unrelated expert "sticking his nose" (publicly backing etc.) into works where he was not seriously involved, is an oxymoron.
C&V compiled the available data. Would you suggest he used the defense experts files or...?
I will not spend time talking about V's manipulation and cheating with data.